Cracks cleave crystals
نویسندگان
چکیده
منابع مشابه
Cracks cleave crystals
– The problem of finding what direction cracks should move is not completely solved. A commonly accepted way to predict crack directions is by computing the density of elastic potential energy stored well away from the crack tip, and finding a direction of crack motion to maximize the consumption of this energy. I provide in this letter a specific case where this rule fails. The example is of a...
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Fig. 1. Behavior of condensates on smooth surfaces and within pores. The surface wettability determines the contact angle θ and the curvature of a liquid condensate on a smooth surface (A) and within a pore (B), where θ and the pore diameter strongly affect the liquid’s vapor pressure (C), here for the case of liquid water. Capillary condensation of a liquid (red) and subsequent crystal (green)...
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Fig. 1. Behavior of condensates on smooth surfaces and within pores. The surface wettability determines the contact angle θ and the curvature of a liquid condensate on a smooth surface (A) and within a pore (B), where θ and the pore diameter strongly affect the liquid’s vapor pressure (C), here for the case of liquid water. Capillary condensation of a liquid (red) and subsequent crystal (green)...
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CRACKS in ductile single crystals are analyzed here for geometries and orientations such that twodimensional states of anti-plane shear constitute possible deformation fields. The crystals are modelled as ideally plastic and yield according to critical resolved shear stresses on their slip systems. Restrictions on the asymptotic forms of stress and deformation fields at crack tips are establish...
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The family of neurotrophic factors known as neurotrophins has yielded a series of surprises, both with regard to the broad extent of their functional roles and the remarkable complexity of their signaling mechanisms. The recent discovery that a neurotrophin precursor protein and its proteolytically processed products may differentially activate pro- and antiapoptotic cellular responses, through...
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ژورنال
عنوان ژورنال: Europhysics Letters (EPL)
سال: 2004
ISSN: 0295-5075,1286-4854
DOI: 10.1209/epl/i2003-10254-4